CVE-2026-12436

Improperly Controlled Modification of Dynamically-Determined Object Attributes in GitLab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an authenticated user to modify CI/CD configuration belonging to another user due to improper validation of user-supplied attributes when processing pipeline schedule inputs.

Affected

GitLab

CVSS v3.1 GITLAB

8.4 HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L

EPSS

0.46% chance of exploitation in the next 30 days, 39th percentile

Published

2026-07-29

Updated

2026-07-31

Proof-of-concept exploits (1)

• https://hackerone.com/reports/3800511

Security advisories

• https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-1-released

References

• CVE Record
• NVD entry